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一九七五年,林宝玉、赖才根及郭振明同志调查陕甘宁盆地西南缘奥陶纪地层时,曾在甘肃平凉太统山及陕西耀县桃启坡村采得一些笔石交笔者鉴定。经过鉴定,平凉太统山的笔石有如下属种:
In 1975, when Comrades Lin Baoyu, Lai Caigen and Guo Zhenming investigated the Ordovician strata in the southwestern margin of the Shanxi-Gannin basin, they collected some pieces from the Taitong Mountain in Pingliang, Gansu Province and Peachuipo Village, Yao County, Shaanxi Province Author identification. After identification, Pingliang Taitongshan pen has the following genus: